C++

Forum

 
find low and average

ashhuber8 (7)
I was having issues with the exchange sort, but finally figured out the issue. Now my find low and average functions are not working. Any ideas?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
 
void sortLow (ofstream &outFile, int studID[], float testScore[], int &count)
{
	// GIVEN: output file, studID array, testScore array
	// TASK: sort student IDs from low to high
	// RETURNS: test scores with matching student IDs from low to high
	int i = 0;
	int j = 0;
	float tempScore;
	int tempID;
		
		
	while( i < count-1 )
	{
		j = i + 1;	
		while( j < count )
		{
			if( studID[i] > studID[j] ) 
			{
				tempID = studID[i];
				tempScore = testScore[i];
				studID[i] = studID[j];
				testScore[i] = testScore[j];
				studID[j] = tempID;
				testScore[j] = tempScore;
			}
				j++;
		}
			i++;
	}




return;
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
void findLow (ofstream &outFile, int studID[], float testScore[], int &count)
{
	// GIVEN: studID array, testScore array
	// TASK: find the student with the lowest test score
	// RETURNS: the student ID with the lowest score
	int min = 0;

	for (count = 0; count < 50; count++)
	{
		if (studID[count] > 0 && testScore[count] < testScore[min])
			min = count;
	}

	outFile << "The lowest test score was " << testScore[min] << "% achieved by student " << studID[min] << endl;

return;
}

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
void findAverage (ofstream &outFile, int studID[], float testScore[], int &count)
{
	// GIVEN: studID array, testScore array
	// TASK: find the average test score for the group
	// RETURNS: the average test score (sum of the test scores divided by the number of test scores)
	double total = 0;
	double average = 0;
	do // add to total while the student ID is positive
	{
		total += testScore[count];
		count++; // increments count
	} while (studID[count] > 0 && studID[count] != -999);

	average = total / count;

	outFile << "The average test score for the group is " << fixed << setprecision(1) << average << "%" << endl; // writes to outfile

return;
}



Here is part of my output...

The lowest test score was -107374176.0% achieved by student -858993460
The average test score for the group is -19362556.3%

I guess I'm just not sure where in the sortLow function it changes my array. If I take the sortLow function out my average and lowest test score works, but if I keep the sortLow function the sorting works, but messes up the other parts.
Topic archived. No new replies allowed.